ABB i-bus KNX Product Manual page 83

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ABB i-bus KNX
Commissioning
Note
The previous brightness value is saved with every OFF telegram unless the ballast, group or output is
already switched off. If this is the case, the OFF state is not saved as the last brightness value on
receipt of another OFF telegram.
If a new OFF telegram is received during dimming down, the current brightness value is saved as the
last brightness value.
In the event of a KNX voltage failure, download or restart, the previous brightness value is lost, and set
to a turn on brightness of 100%.
Separate previous brightness values are saved for the ballast/group and the output.
This means that if the output is dimmed or switched on/off by a central telegram, the previous
brightness value for the ballast/group remains unchanged.
Dim period to reach turn on brightness
Options:
This group object defines whether the dimming time can be changed via KNX.
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Fixed fade time: Dimming time is permanently set and cannot be changed via the KNX.
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Can be changed via object "Flexible time for dimming/fade time": Dimming time can be changed via
the KNX using the Flexible time for dimming/fade time group object.
Note
Flexible dimming time is received via the Output x Flexible time for dimming/fade time group object and
affects various output functions:
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•
•
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To use the Flexible dimming time function you first need to enable the output's Flexible time for
dimming/fade time group object in the A Output/Functions parameter window. You also need to select
the function for the parameter that can be changed via KNX. We recommend that you only change one
time via KNX. Otherwise the dimming time has to be rewritten on the ballast every time a function is
called, which impairs function performance.
Fixed fade time
Can be changed via object "Flexible
time for dimming/fade time"
Dimming time for turn on/off value
Dimming time for brightness value
Dimming time for slave brightness value
Scene transition time
Selection of Fixed fade time option:
Dependent parameters:
DG/S x.64.1.1 | 2CDC507164D0201 81